QUOTE(DerekUGA @ Apr 21 2010, 01:39 AM)

Are you 100% sure about this? I thought it was tied to your Live Gold account if you had one and you could move that account to a new Xbox and re-download the DLC to it. Am I mistaken in assuming that? If this is the case I would have to pass on any further DLC from M$ as that is pretty bogus. I've paid for all the Borderlands DLC to enjoy and plan on getting a new Xbox soon as mine has the RRoD, of course, so I hope for the sake of these game developers that this is not the case.
You can re-download them on another box with your same gamertag IF that xbox can connect to live to validate the content. Only one xbox can be setup to be able to play DLC without being connected to live and that is the one you downloaded them on. They will let you move the "authorized console" with some limitations but I am not sure the details of how that works or if it would work for the OP on a banned box.
So if you get a new Xbox you can redownload and play them just fine as long as you are conencted to live and you might want to look up the details on how to get the one box authroirized to play offline changed.